clang/test/CoverageMapping/coroutine.cpp

   1 // RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -triple x86_64-unknown-linux-gnu -std=c++20 -emit-llvm -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping %s -o - | FileCheck %s
   2
   3 namespace std {
   4 template <typename... T>
   5 struct coroutine_traits;
   6
   7 template <class Promise = void>
   8 struct coroutine_handle {
   9   coroutine_handle() = default;
  10   static coroutine_handle from_address(void *) noexcept { return {}; }
  11 };
  12 template <>
  13 struct coroutine_handle<void> {
  14   static coroutine_handle from_address(void *) { return {}; }
  15   coroutine_handle() = default;
  16   template <class PromiseType>
  17   coroutine_handle(coroutine_handle<PromiseType>) noexcept {}
  18 };
  19 } // namespace std
  20
  21 struct suspend_always {
  22   bool await_ready() noexcept;
  23   void await_suspend(std::coroutine_handle<>) noexcept;
  24   void await_resume() noexcept;
  25 };
  26
  27 template <>
  28 struct std::coroutine_traits<int, int> {
  29   struct promise_type {
  30     int get_return_object();
  31     suspend_always initial_suspend();
  32     suspend_always final_suspend() noexcept;
  33     void unhandled_exception() noexcept;
  34     void return_value(int);
  35   };
  36 };
  37
  38 // CHECK-LABEL: _Z2f1i:
  39 int f1(int x) {       // CHECK-NEXT: File 0, [[@LINE]]:15 -> [[@LINE+8]]:2 = #0
  40   if (x > 42) {       // CHECK-NEXT: File 0, [[@LINE]]:7 -> [[@LINE]]:13 = #0
  41                       // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:7 -> [[@LINE-1]]:13 = #1, (#0 - #1)
  42     ++x;              // CHECK-NEXT: Gap,File 0, [[@LINE-2]]:14 -> [[@LINE-2]]:15 = #1
  43   } else {            // CHECK-NEXT: File 0, [[@LINE-3]]:15 -> [[@LINE]]:4 = #1
  44     co_return x + 42; // CHECK-NEXT: Gap,File 0, [[@LINE-1]]:4 -> [[@LINE-1]]:10 = (#0 - #1)
  45   }                   // CHECK-NEXT: File 0, [[@LINE-2]]:10 -> [[@LINE]]:4 = (#0 - #1)
  46   co_return x;        // CHECK-NEXT: Gap,File 0, [[@LINE-1]]:4 -> [[@LINE]]:3 = #1
  47 } // CHECK-NEXT: File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:14 = #1